Blocked after sending nudes, just didn't want to talk or going to leak my pictures?

I was messaging someone on Grindr and he was asking to trade nudes "because he wasn't ready to trade face yet."I already have a face pic of me on my profile, and I decided to send him a nude. He sent a faceless one back, and asked if I had more. I sent him a torso shot with my face and immediately blocked me after.I'm just worried that he might have been collecting pictures for a fake profile or to leak them somewhere, or could it just be as simple as not being interested?